Suction-box for paper-making machines



(No Model.) 2 Sheets-Sheet 1.

J. O. YOUNG & G. A. DAVIS. summon BOX FOB. PAPER MAKING MACHINES.

No. 426,089. Patented Apr. 22. 1890.

Xvi/ 7 916;. I Q a; 74 m (No Model.) 2 Sheets-Sheet 2. J. G. YOUNG & G. A. DAVIS. SUCTION BOX FOE PAPER MAKING MACHINES.

Patented Apr. 22, 1890.

NlE STATES ATENT OFFICE.

JOHN C. YOUNG AND GEORGE A. DAVIS, OF NEENAII, \VISCONSIN.

SUCTION-BOX FOR PAPER-MAKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 426,089, dated April 22, 1890.

Application filed October 19, 1889. Serial No. 327,597. (No model.)

To aZZ whom it may concern.-

Be it known that we, JOHN C. YOUNG and GEORGE DAVIS, citizens of the United btates, residing at Neenah, in the county of \Vinnebago and State of \Visconsin, have invented a new and useful Improvement in Suction-Boxes for Paper-Making Machines, of which the following is a specification.

Our invention relates to improvements in a suction device over which the wire of a paper-machi no is carried upon a perforated cylinder, said cylinder being so constructed and arranged in position with relation to other parts of the machinery as to constitute acombined suction, wire-driving, and couch roll; and the object of our improvement is to lessen the wear of the wire and produce a suction device that will effectually remove moisture from the pulp while upon said Wire. Ye attain these objects by the mechanism illustrated in the accompanying drawings, in whichk Figure 1 is an end elevation of the device, consisting of a perforated cylinder carrying the Wire of the paper-machine, showing its arrangement upon a paper-machine frame, a part of the standard Which supports said cylinder being represented in dotted lines, so as not to obscure parts the illustration of which is deemed more essential, also showing the wire, one of the dekle-drums, a part of one of the dekle-straps thereon, the dandy-roll, one of the felt-rolls, and the felt thereon. Fig. 2 is an end View, upon a reduced scale, of the suction-boxes, the cylindrical shell thereon, and showing a side of one of the brackets which support the suction-boxes, the support for the cylinder and for the shaft carrying said bracket being omitted. Fig. 3 is a longitudinal section of that part containing the suction-boxes,' (a part of its central portion lengthwise being vbroken away for the purpose of its representation upon a scale permittin g a clear illustration of its parts,) a part of its length being an elevation of its delivery side, showing the paper, the perforations in a part of the revolving cylinder, a part having the cylinder covered with the wire, and its other portions being in section taken upon the line :0 as of Figs. 1. and 2, as seen in looking to ward the left. Fig. at is a detail showing a longitudinal section. upon. the line 11y of Fig.

2, upon the like scale as Fig. l, of a part of one of the sides of the suction-boxes.

Similar letters of reference indicate like parts in the several views.

A is the machine-frame; B, a perforated hollow cylinder; 3', a head therefor; 13",:1 journal extended from the head of said cylinder; 0, a box for said journal; 0, a box-standard at the other end of the cylinder; 0, a set-screw in said box; D, a gear-wheel; E, a shaft; F, a felt-roll; F ,the felt thereon; G, a dekle-drum; G, the deklc-strap thereon; H, the wire of the paper-machine; ll, the paper; a, friction-wheels; a, a spider carrying upon the ends of its arms said wheels; I), a series of small holes formed in the shell of the cylinder B; c, brackets upon the shaft E; (Z d, suction-boxes on said brackets; d", grooves in the sides of said boxes; e e, pipes leading from the boxes (I and (1, respectively; f f, screw-rods which operate the suctionbox heads; 9, flanges forming the suctionbox heads; g, a sheet of india-rubber interposed between the fianges 72 strips of wood inserted in the grooves d; 71 springs under said strips; 1', an air-blast pipe; 7', a showering-pipc.

In the arrangement of our combined suction, wire-driving, and couch roll we mount the perforated cylinder B for revolution, it having in one end the head 13', said head being provided with the journal B", which revolvesin the journal-box G, the extremity of said journal being provided with the gearwheel D, by which the cylinder may be revolved by any available motor. The opposite end of the cylinder is open and is supported for revolution upon a series of friction-wheels a, said wheels being mounted for revolution upon the arms of the spider a, the spider being secured to the shaft E, and said shaft being inserted one end in the head B of the cylinder and the other end in the box-standard G. The shaft is secured in said standard against rotation by means of the set screw 0, thereby permitting the cylinder to revolve around the aforesaid spider upon the wheels a The friction-wheels a are made adjustable nearer to or farther from the center of the shaft E, thereby providing for their wear and their easy insert-ion into and removal from said cylinder. This may be accomplished in any convenient manner, and is represented in the present case as being held in the desired position by means of the set-screw a.

The cylinder is representedin Fig. 3, where a portion of its surface is shown as having said surface pierced with a large number of small holes I). In practice these holes should be one-eighth of an inch in diameter and be five-sixteenths of an inch from center to center (a little more or less may be as effectual) and cover the surface of the cylinder the full width of the wire H.

At several points in the length of the shaft E, and firmly secured thereto, are brackets c, which support the suction-boxes cl cl, each compartment being connected by a separate pipe eand e to the suction-producing power. The pieces composing the suction-boxes 01' the lengthwise channels are secured to the brackets c with screws or bolts, and can be quickly removed for repairs or renewal.

Within each of the compartments (1 d are arranged longitudinally thereof rods f f each one having upon one end of it a right-hand and upon its opposite end a left-hand thread, and carrying upon each of said threaded portions heads g, movable thereon for the purpose of adapting the width of the working part of the suction-boxes to the width of the web of paper passing over them. By the turning of the rodsff by means of cranks or their handles f the heads g are moved nearer to or fart-her from each other, and thereby adapting the suction space to the width of the paper. J

The rods f f" may each consist of two pieces and be operated separately, if desired, their threads not necessarily then being a right and left one. The plan shown is, however, the one we prefer.

The heads gare formed of two metallic flanges threaded internally and fitting upon the threaded portion of the rods, each pair of flanges having clamped between them a thick sheet of india-rubber g, for the purpose of producing an air-tight joint between the heads and sides of said boxes.

A longitudinal section upon the line y y of Fig. 2, upon the scale of Fig. 1, of a part of the side of a suction-box is shown in Fig. 4. A channel d,'as shown in the end View, is cut in each side of said boxes,'which sides are preferably made of metal, into which a strip of wood h is inserted, and having under each strip numerous springs h, which are for the purpose of securing air-tight joints between the sides of said boxes and the interior surface of the perforated cylinder. These springs are shown in Fig. 4 as being formed of athin strip of steel; but coiled wire or india-rubber ones may be made equally effective.

The suction-boxes can be removed from the cylinder 13 for repairs, &c., by first disconnecting the pipes e e, blocking up the open end of the cylinder, and removing the boxstandard 0, which is removably attached to the frame A, when the shaft E, with the spider and friction-wheels, the brackets c, and suction-boxes, can be withdrawn from the cylinder.

The wire H covers the cylinder and the perforations therein, and as the paper in its formation is carried along over said perforations, when it is over either compartment of the suction device it is subjected to their powerful suction. The degree of said suction and the compartment through which is applied said suction are under the control of the attendant bymeans of the necessary cocks which are over more of the interior surface of the cylinder.

At a point within the cylinder B, near its front lower portion and longitudinally thereof, is arranged a pipe 2'. It may be suspended fromthe shaft E or brackets c at the closed end of said cylinder, and having upon its lower side a line of fine holes, or preferably longitudinal slits, through which a blast of air can be thrown, said pipe being provided with a gate or cook by which said blast can be governed. This device is made use of in starting up the machine in the delivery of the sheet of paper from the cylinder to the felt F. As the sheet of paper passes down over the cylinder upon the wire, when opposite this pipe, the air-blast is applied, which detaches the paper from the wire and delivers it to the roll F, where it is caught by the felt and carried onward without the necessity of an. attendant to make the transfer and without the usual loss of material in making it. In the upper couch-roll usually occupies relative to the lower one.

The dandy-roll I we have placed upon'the wire over'the upper compartment of the suction-boxes; but a different location for it may sometimes be used.

It is evident that the perforated cylinder with the suction device herein described is adapted for use in a paper-machine in front of the usual couch-roll in or near the location in which the stationary suction-boxes of a paper-machine are usually placed, and also that it may be used as one of the rolls on which the felt is carried, all of which we con- I sider as within thescope of our invention.

Having described our invention, what we claim, and desire to secure by Letters Patent, 1s-- 1. A suction device for a paper-making machine, comprising a perforated cylinder having one open end, said cylinder being provided upon its opposite end with a journal and being revoluble thereon, the open end of the cylinder being arranged to revolve upon a series of friction-wheels, a non-rotative shaft, one end thereof being supported inside of said cylinder, in the journaled end thereof, the other upon the frame of said machine, said shaft having one or more suction-boxes supported thereon, and around which said perforated cylinder is adapted for revolution, substantially as described.

2. In combination with the Wire of a papermaking machine, a suction device comprising a perforated cylinder having one open end, said cylinder being provided upon its opposite end with a journal and being revoluble thereon, the open end of the cylinder being arranged to revolve upon a series of frictionwheels, a non-rotative shaft, one end of said shaft being supported inside of said cylinder, in the journaled end thereof, the other upon the frame of said machine, said shaft having one or more suction-boxes supported thereon, and around which said perforated cylinder is adapted for revolution, substantially as described.

3. In combination with the wire of a papermaking machine, a suction device comprising a perforated cylinder having one open end, said cylinder being provided upon its opposite end with a journal and being revoluble thereon, the open end of the cylinder being arranged to revolve upon a series of frictionwheels, a non-rotative shaft, one end thereof being supported inside of said cylinder, in the journaled end thereof, the other upon the frame of said machine, said shaft having one or more suction-boxes supported thereonand around which said perforated cylinder is adapted for revolution, each box comprising a channel lengthwise of said shaft, an outlet from each channel, heads movable longitudinally thereof, and means, substantially as described, for adjusting said heads to register with the line of contactof the paper upon the wire carried by said cylinder, substantially as described.

4. In a paper-making machine, the combination of a perforated revoluble cylinder, the wire thereon, a stationarysuction-box within said cylinder, the air-blast pipe 1', means for producing a pressure of air therein and for controlling the degree of said pressure, and openings in the pipe for the escape of said air, the pipe being adapted in position within said cylinder, whereby the escaping air maybe directed through the perforations of said cylinder and the Wire for the purpose of detaching the paper from the wire and for its delivery to the felt upon the felt-rolls of said machine, substantially as described.

5. I11 a suction device for a paper-n1aking machine, the combination of a perforated revoluble cylinder, one or more stationary longitudinal channels around which said. cylinder revolves, the grooves (1, strips h and springs 7L therein, screw-threaded rods longitudinally of said channels, flanges g g, movable thereon, and the india-rubber sheets g between said flanges, substantially as described.

JOHN G. YOUNG. GEORGE A. DAVIS. Witnesses:

JNo. P. SHIELLs, W. L. DAVIS. 

